Compilare: user.cpp: In function ‘int main()’: user.cpp:52:21: warning: operation on ‘A[j]’ may be undefined [-Wsequence-point] A[j]=A[j]=ok; ~~~~^~~~~~~~ user.cpp:13:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&Q); ^ user.cpp:16:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d",&N); ^